I am not that great at guitar so I haven't figured out the entire song perfectly, but I am sure this is the intro/main riff. The one in the other tabs sounds the same but this one is easier to play, plus this is the way I've seen Omar play it during live performances.

e|-20----20----20----20-------------18----18----18----18----18-----|
B|---17----17----17----17---20-17-----15----15----15----15----15---|
G|-----19----19----19----19------19-----17----17----17----17----17-|
D|-----------------------------------------------------------------|
A|-----------------------------------------------------------------|
E|-----------------------------------------------------------------|

If you listen to the song, you should know that this is the intro and the main riff throughout the song. Just listen and you'll know when to play it. If I figure out the rest of the song I'll post it.